Details

The POK is sampled on an approximate period of 1.25us. The "near-by" sample history is saved in a circular buffer. The De-Glitch (filter) is designed to AND the last n entries from the sample history in order to generate the output (to the ESM).

The De-Glitch filter is programmable to {4, 8, 12, 16} samples. The De-Glitch output is based upon a check of only the last entry (0th) and programmed number of samples ago (i.e. 3rd, 7th, 11th, or 15th). The filter ANDs these two results (instead of 4, 8, 12, or 16) in order to to generate the FAIL output to the ESM.

Notice that when the POK is set to monitor a fixed threshold (UV or OV but not set to ping-pong), the un-checked samples will be used.

When the POKs are controlled in a ping-pong manner, the skipped samples will be discarded.

Workaround

There is no workaround.

However, the intent of the De-Glitch (filtering) is to insure that a discrete voltage dip or rise does not trigger FAIL. The sampling of two points significantly separated in time means that the voltage dip / rise was not a single isolated event.

Since the filter requires all N samples to fail before generating a FAIL signal to the ESM, the inclusion of 2 points instead of N makes this circuit more sensitive.